How to setup reasonable ragdoll constraints between body parts?
FWIW, the simple answer for my question is that the constraints between objects are fine as they are.
There is some physics force or bug (yet to be determined) that causes this to happen. Why? Because if I move the whole ragdoll to somewhere else, this doesn't happen.
Added a followup question trying to identify what's that mysterious force, but the ragdoll &quot;wiring&quot; seems fine.